METHOD FOR PREPARING STYRENE POLYMERS Russian patent published in 2005 - IPC

FIELD: chemistry of polymers, chemical technology.

SUBSTANCE: invention describes a method for preparing styrene polymers by emulsion polymerization reaction in the presence of emulsifying agent and cobalt-organic initiating agent with tridentate ligands alkyl-{2-[(2-aminoethyl)imino]pent-3-ene-4-olate}(1,2-ethanediamine)cobalt (III) halides. As an initiating agent methods involves using a mixture consisting of initiating agent with alkyl ligand of normal structure and initiating agent with alkyl ligand of branched structure wherein their the sum concentration is 0.05-0.2 mas. p. per 100 p. p. of monomer and their ratio is from 2:1 to 9:1. The process is carried out at temperature 10-80°C and pH 4-10. Invention provides reducing the inductive period and possibility for using monomers with industrial treatment degree, i. e. stabilizing agent-containing monomers.

EFFECT: improved method for preparing.

5 cl, 1 tbl, 9 ex